Granted Patent
Utility
US 6,087,815 · App. 08/965,748
Portable power system using DC to DC converter
Inventors:
John Pfeifer, James C. Boda, David Michael Hoerr
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Nov 7, 1997
Inventors
John Pfeifer
James C. Boda
David Michael Hoerr
Assignee (at issue)
Fiskars Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.